Powder depositor



6,1940. I J. STERLING 2,210,470

POWDER DEPOS ITOR Filed Nov. 29, 1938 Patented Aug. 6, 1940 PATENT OFFICE POWDER nnnosrron Joseph Sterling, Rochester, N. Y assignor to Sterling Manufacturing Company, Rochester,

Application November 29, 1938, Serial No. 243,024

7 Claims.

, The invention relates to a powder depositor. I

The object .of the present invention is to pro.- vide a simple, practical and efficient portable device of stron durable and comparatively intiger in applying such powder to molds.

Also it is an object of the invention to enable powder to be appliedto molds more rapidly than is possible when an open bag is employed for 20 such purpose and at the same time to efiecta great saving of the material used in such operation.

Another object of the invention is to provide a powder depositor having a casing open at the bottom and constituting a hood and adapted to contain a closed bag of the powder to be deposited on molds and articles to be treated in molds and provided with means for introducing compressed air into the casing for forcing the powder out of the bag and for discharging the powder through I the open end of the casing upon the molds or articles from a point in close proximity to the same so that there will be little chance of anyof the dust escaping into the surrounding atmosphere.

Another object of the invention is to enable air under pressure from a compressed air supply pipe or tube to be introduced into the casing and to be substantially uniformly distributed therein 40 so as to subject the bag of powder to a substantially uniform pressure sufiicient to cause a discharge of powder from the bag through the open end of the casing.

Another object of the invention is to provide a 45 portable powder depositor having means for con-'- trolling the introduction of compressed air into :i the dust caused by shakin by hand bags of powa combination and arrangement of parts hereinafter fully described, illustrated in the accompar-lyingdrawing and pointed out in the claims hereto appended, it being understood that various changes in the form, proportion and minor details of construction, Within the scope of the claims, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawing:

Fig. 1 is a side elevation .of a powder depositor constructed in accordance with this invention.

Fig. 2 is a longitudinal sectional view of the same.

Fig. 3 is a transverse sectional view of the powder depositor.

Fig. 4 is a detail perspective view of the tray supportin bar.

Inthe accompanying drawing in which is illustrated the preferred embodiment of the invention, the powder depositor is provided with a casing l constructed ofsheet metal or other suitable material and comprising an upwardly tapered body portion 2 and a substantially semicylindrical top portion 3. The upwardly tapered body portion is open at the bottom and is of greater length than width and has upwardly and inwardly inclined side and end walls t and 5. The end walls t of the semicylindricaltop portion 3 of the casing are vertical and the curved top wall of the portion 3 forms a dome over the tapered body portion and is adapted to assist in directing and diffusing air introduced into the semicylindrical top portion of the casing. The tapered body portion of the casing being open at the bottom forms a downwardly flaring mouth for the discharge of powder.

Within the tapered body portion of the casing is supported a tray 1 adapted to receive and support a bag of powder which powder is to bedischarged through the open bottom or flaring mouth by compressed air introduced into the top portion of the casing as hereinafter fully explained. The bag is closed and the fabric of the bag is of a character which will permit the powder to be forced out of the bag by pneumatic pressure applied to the bag as hereinafter explained. The bag holding tray is constructed of screen material but any other suitable foraminous material may of course be employed. The tray is arranged in contiguous. or abutting relation with the side and end walls 4 and 5 of the casing and is supported detachably within the tapered portion of the casing by a horizontal bar 8 extending longitudinally of the tray midway between the side walls thereof and passing through slots or openings 9 and 10 in the end walls of the casing. One end of the bar 8 is coiled to form a ring or loop and the other end I2 is bent at an angle to provide an inclined lug which engages the adjacent end Wall 5 of the casing at the bottom of the slot Ill when the bar 8 is in supporting position. The loop or ring ll forms a grip or handle and the inclined terminal portion or lug ['2 of the bar while preventing accidental displacement of the bar when the device is in use will enable the bar to be readily withdrawn from the casing when it is desired to remove the tray.

The tray 1 which is arranged in abutting relation or contiguous to the walls of the tapered portion of the casing has downwardly and inwardly inclined side walls l3 while the end walls I4 incline upwardly and inwardly and conform to the inclination of the end walls 5 of the casing and fit flat against the same. The inclination of the end walls [4 of the tray and the supporting bar 8 provides. a firm fit and attachment of the tray to the casing. The powder contained in the bag i may be plumbago or any other powder adapted for coating molds to prevent articles from sticking to the same.

The compressed air is introduced into the top of the casing from a compressed air supply pipe l5 which is connected by a standard fitting IS with a nipple ll of an air pipe I8 extending longitudinally of the casing at the top thereof. The air pipe or tube is located within a tubular member l9 secured within the casing at the top thereof and of greater diameter than the air pipe I8 and extending the entire length of the top of the casing as clearly illustrated in Fig. 2 of the drawing. The air pipe I8 is secured to the tubular member H! at the top thereof as clearly illustrated in Fig. 3 of the drawing and it is provided at the bottom with one or more air outlets 20 which discharge the compressed air downwardly against the imperforate bottom of the tubular member and the cylindrical interior of the tubular member l9 presents air deflecting surfaces and diffuses the compressed air and causes the same to pass upwardly and out through discharge apertures 2| formed in the tubular member at opposite sides of the top portion thereof and at spaced intervals. While the tubular member and the air pipe are shown of cylindrical form any other preferred form of chamber or air pipe may of course be provided.

The air discharged from the tubular member which provides an air control chamber impinges against the curved wall of the semicylindrical top portion of the casing and is directed downwardly so that air under pressure is diifused and distributed substantially uniformly throughout the upper portion of the tapered body of the casing above the bag of powder and is adapted to cause powder from the bag to pass through the interstices or openings of the tray and be discharged substantially uniformly in a downward direction through the open bottom of the easing, The standard fitting It is provided with a button valve. 22 which is adapted to be easily operated to cause intermittent jets of air to be introduced into the upper portion of the casing or a continuous flow of air into the casing. The particular shape of the casing enables the powder to be accurately discharged upon molds or articles to be treated in molds. The hood formation of the casing prevents the escape of powder into the surrounding atmosphere which will be comparatively free from dust and the deleterious effect of breathing such powder into the lungs of persons employed in foundries and other places using such powder is avoided to a material degree. The air control chamber in conjunction with the air pipe contained within it will enable the device to be efiective with air under varying pressures as the air under pressure will be diffused and distributed through the upper portion of the casing and a uniform pressure maintained upon the bag of powder. In practice the air supply pipe !5 will be provided with suitable coupling means for enabling it to be readily connected to compressed air supply pipes provided at various points throughout a plant and the device may be readily transferred from one point orplace to another and is easily handled and is practically indestructible, repacking the valve at intervals being practically the only attention which may be required to maintain the device in perfect working condition.

It is to be understood that while a particular shape of casing has been illustrated and described that I do not wish to be limited to the particular form of casing shown as other shapes and forms of casings are adaptable to my purposes without departing from the spirit of the invention as is obvious from the appended claims.

What is claimed is:

1. A portable powder depositor comprising a casing having an opening at the bottom of the casing for the discharge of powder, means located within the casing at an intermediate point between the top and bottom thereof for holding powder to be discharged therefrom, means for introducing air under pressure into the casing at the top thereof for discharging powder through said opening, and; means interposed between the powder and the point of introduction of the compressed air into the casing for distributing the air throughout the adjacent portion of the casing to produce a substantially uniform air pressure on the powder, whereby a Luniform discharge of powder is efiected.

2. A portable powder depositor comprising a casing open only at the bottom, a receptacle located within the casing above the open bottom for holding powder, means for delivering air under pressure to the top of the casing for discharging powder through the open bottom of the casing, and means located within the casing and interposed between the incoming air and the powder at the surface of the mass of powder remote from the open bottom of the casing for distributing the air substantially uniformly within the casing and for causing a substantially uniform discharge of powder through the open bottom of the casing.

3. A portable powder depositor including a casing open only at the bottom and forming a hood, a receptacle located Within the casing for supporting. powder to be deposited, an air control chamber arranged within the casing above the powder receptacle and provided with a plurality of discharge apertures for uniformly distributing air to the casing, and means for introducing air under pressure into the air control chamber having an air outlet located out of alignment with said apertures and discharging in a different direction from the discharge of the apertures.

4. A portable powder depositor comprising a casing open at the bottom and tapered upwardly to form a flaring outlet for the discharge of powder and closed at the top, a foraminous tray arranged within the casing for supporting powder to be deposited, means for introducing air under pressure into the casing above the tray, and means including air deflecting surfaces cooperating with the walls of the casing for distributing and diffusing air through the upper portion of the casing for causing a substantially uniform discharge of powder through the open bottom of the casing.

5. A powder depositor comprising a casing open at the bottom and tapered upwardly to forma flaring outlet for the discharge of powder and closed at the top, a foraminous tray arranged horizontally within the casing in abutting relation with the walls thereof, means for introducing air under pressure into the casing above the tray, and means interposed between the tray and the point of introduction of the air for distributing and diffusing the air through the upper portion of the casing for causing an even discharge of powder through the open bottom of through the open bottom of the casing, a,tubular member arranged within and extending longitudinally of the semicylindrical top of the casing adjacent the curved wall of the same and provided at opposite sides at its upper portion with spaced air discharge apertures, and a compressed air inlet pipe extending longitudinally of the tubular member and arranged within the same at the top thereof and provided at the bottom below the horizontal plane of the air discharge apertures with an air outlet.

7. 'A powder depositor including a casing open only at the bottom for the discharge of powder, means located within the casing for holding powder to be deposited, a tubular member arranged Within the upper portion of the casing and provided at opposite sides with air discharge apertures and a compressed air supply pipe having control means and located within and extending longitudinally of the tubular member and provided with an air outlet located outside the plane of said apertures anddischarging in a different direction.

JOSEPH S'ITERIING. 

